An assistant wireless UE positioning method and device is provided, and relates to the field of wireless communication. The device includes: a request sending component configured to, when first UE to which it belongs does not have a positioning capability, initiate an assistant positioning request to at least one piece of second UE which has finished positioning near the first UE, and store sending time of the assistant positioning request; a response receiving component, configured to receive assistant positioning information in response to the assistant positioning request by the second UE, and store receiving time of the assistant positioning information; and a positioning calculation component configured to determine a spatial position by virtue of the assistant positioning information, the receiving information and the sending time of the assistant positioning request.